diff --git a/util/kconfig/confdata.c b/util/kconfig/confdata.c
index 149e27a..235debf 100644
--- a/util/kconfig/confdata.c
+++ b/util/kconfig/confdata.c
@@ -59,6 +59,7 @@
 	va_start(ap, fmt);
 	if (conf_message_callback)
 		conf_message_callback(fmt, ap);
+	va_end(ap);
 }
 
 const char *conf_get_configname(void)